Just finished making a conversion to fit the SRT8 Brembo 4 piston calipers to my 95 XJ Cherokee.
These are all the pieces I came up with to do the conversion.
The brackets I made bolt to the back of the knuckle
They are big!
The rotors I used with a matching 5x4.5"pcd are from a Ford Territory Turbo and measure 340mm/13.5" and 32mm thick.
They fit nicely behind my 17" rims too.